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dc.contributor.authorFrail, D.
dc.contributor.authorMooley, K.
dc.contributor.authorJagannathan, P.
dc.contributor.authorIntema, Hubertus
dc.date.accessioned2019-02-19T04:17:18Z
dc.date.available2019-02-19T04:17:18Z
dc.date.created2019-02-19T03:58:34Z
dc.date.issued2016
dc.identifier.citationFrail, D. and Mooley, K. and Jagannathan, P. and Intema, H. 2016. Pulsar candidates towards Fermi unassociated sources. Monthly Notices of the Royal Astronomical Society. 461 (1): pp. 1062-1067.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/74534
dc.identifier.doi10.1093/mnras/stw1390
dc.description.abstract

We report on a search for steep spectrum radio sources within the 95 per cent confidence error ellipses of the Fermi unassociated sources from the Large Area Telescope (LAT). Using existing catalogues and the newly released Giant Metrewave Radio Telescope all-sky survey at 150 MHz, we identify compact radio sources that are bright at MHz frequencies but faint or absent at GHz frequencies. Such steep spectrum radio sources are rare and constitute a sample of pulsar candidates, selected independently of period, dispersion measure, interstellar scattering and orbital parameters. We find point-like, steep spectrum candidates towards 11 Fermi sources. Based on the gamma-ray/radio positional coincidence, the rarity of such radio sources, and the properties of the 3FGL sources themselves, we argue that many of these sources could be pulsars. They may have been missed by previous radio periodicity searches due to interstellar propagation effects or because they lie in an unusually tight binary. If this hypothesis is correct, then renewed gamma-ray and radio periodicity searches at the positions of the steep spectrum radio sources may reveal pulsations.

dc.publisherOxford University Press
dc.titlePulsar candidates towards Fermi unassociated sources
dc.typeJournal Article
dcterms.source.volume461
dcterms.source.number1
dcterms.source.startPage1062
dcterms.source.endPage1067
dcterms.source.issn0035-8711
dcterms.source.titleMonthly Notices of the Royal Astronomical Society
curtin.note

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

curtin.accessStatusOpen access


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